How to change the format of table captions?

Question

How I can change "Table 1: sample" to "Table 1. sample"?

PS. I'm using ctable, if it important:

\documentclass{article}
\usepackage{ctable}
\begin{document}
\ctable
[caption={sample}]
{|l|r|}
{}
{
  \hline
  test & some example stuff \\ \hline
  \hline
}
\end{document}

Answer 1

Use the caption package:

\documentclass{article}
\usepackage{ctable}
\usepackage[labelsep=period]{caption}

\begin{document}
\ctable
[caption={sample}]
{|l|r|}
{}
{
  \hline
  test & some example stuff \\ \hline
  \hline
}
\end{document}

If you want the change to only apply to ctable, a bit more setup is required:

\usepackage{etoolbox}
\usepackage{ctable}
\usepackage{caption}

\makeatletter
\preto\@ctblCaption{\captionsetup{labelsep=period}}
\makeatother